Instructions
Line Instructions
Tax Year
Enter the beginning and ending dates of the tax year filed.
Name, Address and Colorado Account Number and Federal Employer Identification Number
Print or type this information in the space provided exactly as it appears from Colorado Form 112.
Part I — Tax Return Information
Line 1 — Report the total income from federal Form 1120.
Line 2 — Report the amount of taxable income reported on Federal Form 1120.
Line 3 — Report the amount of tax reported on Colorado Form 112, line 17.
Line 4 — Report the amount indicated as Colorado payments from Colorado Form 112 line 22.
Line 5 — Report the amount reported as the amount you owe from Colorado Form 112 line 30.
Line 6 — Report the amount reported as a refund on Colorado Form 112 line 33.
Part II — Declaration of Taxpayer (Taxpayer using ERO or Taxpayer who is a PC filer)
All Taxpayers
All Taxpayers are required to sign and date the DR 8453C at the time of filing. An electronically transmitted income tax
return will not be considered complete and/or filed until the DR 8453C has been signed/dated by all appropriate taxpay-
ers. Retain a copy of this form in your records for four years. When feasible, attach this form in PDF format to the e-filed
return.
Taxpayers Using an ERO or Preparer
Taxpayers who use an ERO or tax preparer should maintain copies of all information given to them by the ERO or tax
preparer for the period covered by the statute of limitations, but are not required to mail anything to the Colorado
Department of Revenue at the time of filing.
Part III — Declaration of Electronic Return Originator (ERO), Preparer or Transmitter
The ERO or the preparer of the return is required to sign and date the DR 8453C at the time of filing. If the ERO is also
the preparer, the check box labeled "Check if also preparer" must be checked. The ERO or preparer is also required
to report their Social Security Number or preparer identification number (PTIN) in the space provided. If the taxpayer is
the preparer, PART III does not need to be signed/dated.
Other Information
Colorado Statute of Limitations
The general rule for the Colorado statute of limitations is the federal statute of limitations plus one year, or four years
from the federal due date of March 15.
DR 8453C on Demand by Colorado DOR
The paid preparer is also responsible for establishing and maintaining a system that allows retrieval of any particular
DR 8453C and attachments by taxpayer social security number on demand by the Colorado DOR.
For help, call the Department of Revenue's Federal/State Electronic Filing Help Desk: 303-866-3889 or visit our e-Filing
Options page at: