MyDec Helpful Resources

MyDec at MyTax Illinois - used by individuals, title companies, and settlement agencies to submit, approve, or reject Real Property Transfer Tax Declarations.

MyDec allows you to electronically submit:

• State of Illinois Forms PTAX-203, 203-A, and 203-B
• City of Chicago Form 7551 – Real Property Transfer Tax Declaration
• Real Property Transfer Tax Declarations for participating counties.

To get started, visit the MyDec at MyTax Illinois webpage or select the applicable procedure manual below.

Procedure Manuals

IDOR-PT1, MyDec Preparer Access Procedures - This procedure manual provides detailed steps and screenshots for the Preparers work in MyDec, including those for accessing MyDec, navigating MyDec, and entering PTAX-203s. 

Assessor Procedure Manuals

IDOR-PT2, MyDec County Assessor Access Procedures - This procedure manual provides detailed steps and screenshots for the County Assessors work in MyDec, including those for accessing MyDec, navigating MyDec, and entering PTAX-203s.  

IDOR-PT2- AppA, MyDec County Assessor Access Procedures Appendix A - How to Locate a Saved Declaration

IDOR-PT2, AppB, MyDec County Assessor Access Procedures Appendix B - How to Locate and Withdraw a Saved Declaration

IDOR-PT2-AppC,  MyDec County Assessor Access Procedures Appendix C - Updating Address Fields for MyDec Declarations

IDOR-PT2-AppD, MyDec County Assessor Access Procedures Appendix D - MyDec CA Township Assessor Access Type

IDOR-PT2-SU, MyDec County Assessor Access Procedures -  ID and PW Setup and Inviting Users

County Recorder Manuals

IDOR-PT3, MyDec County Recorder Access Procedures - ID and PW Setup and Inviting New Users

IDOR-PT3-AppA, MyDec County Recorder Access Procedures Appendix A - Re-Recording a MyDec Declaration Recorded as Paper

IDOR-PT3-AppB, MyDec County Recorder Access Procedures  Appendix B - Unrecord a MyDec Declaration Without Voiding Stamp

IDOR-PT3-AppD, MyDec County Recorder Access Procedures Appendix D - Unrecord a MyDec Declaration Including Voiding Stamps

IDOR-PT3-AppE, MyDec County Recorder Access Procedures Appendix E - Unrecord a Paper Declaration Including Voiding Stamps

IDOR-PT3-AppF, MyDec County Recorder Access Procedures Appendix F - MyDec Declaration with an Incorrect PIN

IDOR-PT3-AppG, MyDec County Recorder Access Procedures Appendix G - Paper Declaration with an Incorrect PIN

IDOR-PT3-AppK, MyDec County Recorder Access Procedures Appendix K - Non-MyDec County-Correct Invalid Document Number

IDOR-PT3-Pay, MyDec County Recorder Access Procedures - Debit Payment Option

IDOR-PT3-Rpt, MyDec County Recorder Access Procedures - Reporting Only