<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>123 - Disclosure - Income Taxes</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

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</LabelSeparator><Level>2</Level><ElementName>us-gaap_IncomeTaxDisclosureTextBlock</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>verboseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="P01_01_2013To06_30_2013" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>              &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "&gt;  &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;strong&gt;Note 17. Income Taxes&lt;/strong&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="COLOR: black"&gt;The Company&amp;#8217;s Effective Tax Rate  (&amp;#8220;ETR&amp;#8221;)&lt;/font&gt; for the three months ended June 30, 2013  and 2012 was (&lt;font style=" FONT-SIZE: 10pt"&gt;5.00&lt;/font&gt;%) and  (&lt;font style=" FONT-SIZE: 10pt"&gt;2.00&lt;/font&gt;%), &lt;font style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10pt"&gt;  respectively. The Company&amp;#8217;s ETR for the six months ended June  30, 2013 and 2012 was (5.40%) and (2.00%),&lt;/font&gt; respectively.  &lt;font style="COLOR: black"&gt;The provision for income taxes mainly  relates to taxable income generated by certain of  TranSwitch&amp;#8217;s subsidiaries located in foreign jurisdictions.  The ETR differs from the U.S. federal statutory rate for the  periods presented primarily due to foreign income taxes, increases  in the valuation allowance for domestic deferred income tax assets,  and additional reserves for uncertain tax positions recorded during  the periods.&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  During the three and six months ended June 30, 2013 and 2012, we  evaluated our deferred income tax assets as to whether it is  &amp;#8220;more likely than not&amp;#8221; that the deferred income tax  assets will be realized. In our evaluation of the realizability of  deferred income tax assets, we consider the most recent three year  period for financial statement income, projections of future  taxable income, the reversal &lt;font style="COLOR: black"&gt;of  temporary differences and tax planning strategies. We have  evaluated the realizability of the deferred income tax assets and  have determined that it is &amp;#8220;more likely than not&amp;#8221; that  all of the domestic deferred income tax assets will not be  realized. Accordingly, a valuation allowance was recorded for all  of our domestic net deferred income tax assets. In future periods,  we will not recognize a domestic deferred tax benefit and will  maintain a full deferred tax valuation allowance until we achieve  sustained U.S. taxable income. Additionally, in the future, we  expect our current income tax expense to be related to taxable  income generated by our foreign subsidiaries.&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  The Company is required to make a determination of any of its tax  positions (federal and state) for which the sustainability of the  position, based upon the technical merits, is uncertain. The  Company regularly evaluates all tax positions taken and the  likelihood of those positions being sustained. &lt;font style=" "&gt;If  management is highly confident that the position will be allowed  and there is a greater than 50% likelihood that the full amount of  the tax position will be ultimately realized, the Company  recognizes the full benefit associated with the tax  position&lt;/font&gt;. Otherwise, the Company is required to record a  reserve against the full benefit of that uncertain position.  Additionally, interest and penalties related to uncertain tax  positions are included as a component of income tax expense. &lt;font  style="TEXT-TRANSFORM: uppercase"&gt;A&lt;/font&gt;s of June 30, 2013 and  December 31, 2012 the Company has accrued $&lt;font style=" FONT-SIZE: 10pt"&gt;0.1&lt;/font&gt; million in interest on its uncertain  tax positions and recorded that amount as part of its tax  provision. The Company believes that there are no uncertain issues  that are reasonably expected to be resolved in the next 12  months.&lt;/div&gt;  &lt;/div&gt;        </NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

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