After filing my taxes I just received a NOTICE OF COLLECTION from my state Department of Revenue, stating that I owe more money than TurboTax calculated including FEE.

[paul_r_reid]

Looks like Turbo Tax calculated what I owed inaccurately and now I need to pay a penalty and additional funds.  What gives?  I pay for this service to be 100% correct.

[SweetieJean]

Did you make a data entry error, or forget to claim some income?

[paul_r_reid]

Not that I can see on any form submitted or the return itself.  All tax documents received have been accounted for

[Critter]

TT calculates an estimated underpayment penalty based on your entries in the program  however the feds & state reserve the right to access a final underpayment penalty, late filing penalty or late paying penalty ( plus interest ) based on the info they have and when the balance due was actually paid.      https://www.irs.gov/individuals/understanding-your-cp14-notice