Maybe don't mention that you are doing an amendment with Sprintax. You just need to have a 2019 1040NR and 2019 state return prepared through Sprintax. The only issue is that you do not want them to file the returns or e-file the returns. You need to tell them you only want to print and mail them.
You will need to go to your state's website and download their state amended return form.
Then you can do the amended part on your own.
Print your 1040NR in Sprintax; do not e-file it.. You must mail the 1040NR along with the amended return Form 1040X
Per IRS Form 1040X instructions, page 8:
To amend and file the correct return, do the following:
Enter your name, current address, and social security number (SSN) or individual taxpayer identification number (ITIN) on the front of Form 1040X.
Don’t enter any other information on page 1. Also, don’t complete Parts I or II on page 2 of Form 1040X.
Enter in Part III the reason why you are filing Form 1040X.
Complete a new or corrected return, Form 1040NR,
Across the top of the new or corrected return, write “Amended.”
Attach the new or corrected return to the back of Form 1040X.
**Make sure you check the box to show the tax year that you are amending on Form 1040X.
Sprintax
Form 1040X
1040X Instructions
To return your stimulus check to the IRS see the information in the attached link... IRS Returning an Erroneous Refund
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