<?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>010 - Disclosure - Note 6 - 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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      &lt;font style="FONT-FAMILY: Times New Roman, Times, serif; FONT-SIZE: 10pt"&gt;&lt;b&gt;Note

      6. Income Taxes&lt;/b&gt;&lt;/font&gt;

    &lt;/p&gt;&lt;br/&gt;&lt;p style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; TEXT-INDENT: 29.7pt; MARGIN: 0pt; COLOR: #000000" id="PARA4342"&gt;

      &lt;font style="FONT-FAMILY: Times New Roman, Times, serif; FONT-SIZE: 10pt"&gt;The

      Company recognizes interest and penalties related to

      uncertain tax positions as a component of income tax expense.

      A reconciliation of the beginning and ending amount of

      unrecognized tax benefits, which is included in other

      long-term liabilities in the balance sheet as of June 30,

      2013, is as follows (in thousands):&lt;/font&gt;

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        &lt;td style="TEXT-ALIGN: left; BACKGROUND-COLOR: #cceeff; WIDTH: 81%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom"&gt;

          &lt;p style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; MARGIN: 0pt; COLOR: #000000" id="PARA4344"&gt;

            &lt;font style="FONT-FAMILY: Times New Roman, Times, serif; FONT-SIZE: 10pt"&gt;Beginning

            balance at January 1, 2013&lt;/font&gt;

          &lt;/p&gt;

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: right; BACKGROUND-COLOR: #cceeff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.1.lead.2"&gt;

          &amp;#160;

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: left; BACKGROUND-COLOR: #cceeff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.1.symb.2"&gt;

          $

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: right; BACKGROUND-COLOR: #cceeff; WIDTH: 16%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.1.amt.2"&gt;

          41

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: left; BACKGROUND-COLOR: #cceeff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.1.trail.2" nowrap="nowrap"&gt;

          &amp;#160;

        &lt;/td&gt;

      &lt;/tr&gt;

      &lt;tr id="TBL4356.finRow.2"&gt;

        &lt;td style="TEXT-ALIGN: left; BACKGROUND-COLOR: #ffffff; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom"&gt;

          &lt;p style="TEXT-ALIGN: left; LINE-HEIGHT: 1.25; MARGIN: 0pt; COLOR: #000000" id="PARA4348"&gt;

            &lt;font style="FONT-FAMILY: Times New Roman, Times, serif; FONT-SIZE: 10pt"&gt;Additions

            for tax positions related to the current period&lt;/font&gt;

          &lt;/p&gt;

        &lt;/td&gt;

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          &amp;#160;

        &lt;/td&gt;

        &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: left; BACKGROUND-COLOR: #ffffff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.2.symb.2"&gt;

          &amp;#160;

        &lt;/td&gt;

        &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: right; BACKGROUND-COLOR: #ffffff; WIDTH: 16%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.2.amt.2"&gt;

          10

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: left; PADDING-BOTTOM: 1px; BACKGROUND-COLOR: #ffffff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.2.trail.2" nowrap="nowrap"&gt;

          &amp;#160;

        &lt;/td&gt;

      &lt;/tr&gt;

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        &lt;td style="TEXT-ALIGN: left; BACKGROUND-COLOR: #cceeff; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom"&gt;

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            &lt;font style="FONT-FAMILY: Times New Roman, Times, serif; FONT-SIZE: 10pt"&gt;Ending

            balance at June 30, 2013&lt;/font&gt;

          &lt;/p&gt;

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: right; BACKGROUND-COLOR: #cceeff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.3.lead.2"&gt;

          &amp;#160;

        &lt;/td&gt;

        &lt;td style="BORDER-BOTTOM: #000000 3px double; TEXT-ALIGN: left; BACKGROUND-COLOR: #cceeff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.3.symb.2"&gt;

          $

        &lt;/td&gt;

        &lt;td style="BORDER-BOTTOM: #000000 3px double; TEXT-ALIGN: right; BACKGROUND-COLOR: #cceeff; WIDTH: 16%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.3.amt.2"&gt;

          51

        &lt;/td&gt;

        &lt;td style="TEXT-ALIGN: left; PADDING-BOTTOM: 3px; BACKGROUND-COLOR: #cceeff; WIDTH: 1%; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 0pt; FONT-SIZE: 10pt; VERTICAL-ALIGN: bottom" id="TBL4356.finRow.3.trail.2" nowrap="nowrap"&gt;

          &amp;#160;

        &lt;/td&gt;

      &lt;/tr&gt;

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      &lt;font style="FONT-FAMILY: Times New Roman, Times, serif; FONT-SIZE: 10pt"&gt;At

      June 30, 2013, and December 31, 2012, the Company had net

      deferred tax assets that were fully offset by a valuation

      allowance, as management believes that it is not more likely

      than not that the Company will realize the benefits of the

      deductible differences. The deferred tax asset is principally

      due to net operating loss carryforwards of approximately $446

      million for federal and $40 million for state tax purposes.

      The majority of these net operating loss carryforwards will

      expire, if unused, between 2013 and 2021.&lt;/font&gt;

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