Exhibit (a)(21)

DEUTSCHE INCOME TRUST

Amended and Restated Establishment and Designation of Series

and Classes of Shares of Beneficial Interest, With $0.01 Par Value

WHEREAS, the Trustees of Deutsche Income Trust (the “Trust”), acting pursuant to the Trust’s Amended and Restated Declaration of Trust, dated June 2, 2008, as amended, (the “Declaration”), had previously established and designated one or more series of shares of beneficial interest in the Trust (each, a “Series” consisting of “Shares”) pursuant to one or more designations of series (the “Prior Series Designations”) and had previously established and designated one or more classes of Shares (each, a “Class”) for some or all of the Series pursuant to one or more designations of classes (the “Prior Class Designations,” such Prior Series Designations and Prior Class Designations referred to herein collectively as the “Prior Designations”);

WHEREAS, the Trustees of the Trust, effective September 21, 2016, restated the Trust’s Prior Designations, the terms of the restated designation to supersede any terms set forth in the Prior Designations;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Core Fixed Income Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Fixed Income Opportunities Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Global High Income Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Global Inflation Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche GNMA Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche High Income Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Short Duration Fund;

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Strategic Government Securities Fund; and

WHEREAS, pursuant to Article V, Section 5.11 of the Declaration, the Trustees, at a meeting held on December 2, 2016, approved the creation of the “Class T” shares of Deutsche Unconstrained Income Fund.

NOW THEREFORE, pursuant to Article V, Section 5.12 and Article VIII, Section 8.3 of the Declaration, the Trustees of the Trust, effective on the date hereof, hereby amend and restate the Trust’s Prior Designations, the terms of which are to supersede any terms set forth in the Prior Designations:

1.       The following Series of Shares and Classes thereof are established and designated, the Shares, with $0.01 par value, of such Series and Classes to be subject to the terms of, and entitled to all the rights and preferences accorded to Shares of a Series, and, if applicable, a Class under, the Declaration and this amended and restated designation:

Deutsche Core Fixed Income Fund	Class A
	Class C
	Class R
	Class S
	Class T
	Institutional Class
Deutsche Fixed Income Opportunities Fund	Class A
	Class C
	Class R6
	Class S
	Class T
	Institutional Class
Deutsche Global High Income Fund	Class A
	Class C
	Class R6
	Class S
	Class T
	Institutional Class
Deutsche Global Inflation Fund	Class A
	Class C
	Class S
	Class T
	Institutional Class

Deutsche GNMA Fund	Class A
	Class C
	Class R
	Class R6
	Class S
	Class T
	Institutional Class
Deutsche High Income Fund	Class A
	Class C
	Class R
	Class R6
	Class S
	Class T
	Institutional Class
Deutsche Limited Maturity Quality Income Fund	Institutional Shares
	Investment Class
Deutsche Short Duration Fund	Class A
	Class C
	Class R6
	Class S
	Class T
	Institutional Class
Deutsche Strategic Government Securities Fund	Class A
	Class C
	Class S
	Class T
	Institutional Class
Deutsche Ultra-Short Investment Grade Fund	Institutional Shares
	Investment Class
Deutsche Unconstrained Income Fund	Class A
	Class C
	Class R6
	Class S
	Class T
	Institutional Class

2.       For Shares of a Class of a Series, the relative rights and preferences of such Class shall be as determined by the Trustees of the Trust from time to time in accordance with the Declaration and set forth in the Trust’s Multi-Distribution System Plan adopted pursuant to Rule 18f-3 under the Investment Company Act of 1940, as amended, as such Plan may be amended from time to time, or as otherwise required by applicable law. The

Shares of a Class of a Series shall have such other terms, features and qualifications as may be determined by the Trustees of the Trust from time to time in accordance with the Declaration and set forth in the current prospectus and statement of additional information of the Series relating to such Class, contained in the Trust’s registration statement under the Securities Act of 1933, as amended, (if applicable) as such prospectus or statement of additional information may be further supplemented from time to time.

3.       The designation of the Series and Classes hereby shall not impair the power of the Trustees from time to time to designate additional Series and Classes of Shares of the Trust.

[The remainder of this page is intentionally blank.]

IN WITNESS WHEREOF, the undersigned, being a majority of the Trustees of the Trust, have executed this instrument as of this 2^nd day of December 2016.

/s/ John W. Ballantine	/s/ Henry P. Becton, Jr.
John W. Ballantine, Trustee	Henry P. Becton, Jr., Trustee
/s/ Dawn-Marie Driscoll	/s/ Keith R. Fox
Dawn-Marie Driscoll, Trustee	Keith R. Fox, Trustee
/s/ Paul K. Freeman	/s/ Kenneth C. Froewiss
Paul K. Freeman, Trustee	Kenneth C. Froewiss, Trustee
/s/ Richard J. Herring	/s/ William McClayton
Richard J. Herring, Trustee	William McClayton, Trustee
/s/ Rebecca W. Rimel	/s/ William N. Searcy
Rebecca W. Rimel, Trustee	William N. Searcy, Jr., Trustee
/s/ Jean Gleason Stromberg
Jean Gleason Stromberg, Trustee