If you used the TT program last year then the prior year info for the 2210 should have been carried forward for this calculation. If you had a balance due on the return the program would have taken you there and asked you to review that information for accuracy and offered the form 2210-AI to reduce or minimize it.
Log into your program, scroll down and click on ADD A STATE to open the program and review that section again ... maybe you can refute the IRS notice with a 2210-AI form.
