My state refund is way too high.

Your W-2 gets entered in Federal > Wages and Income, and then the program transfers it to State.

Check your data entry for any typos, especially commas, decimals and extra zeroes.

Did you find the error in your return? I am having the same issue but there are no errors of entry or commas in the wrong place.

@freyek Please thoroughly check all your entries in your federal return as something entered has to be contributing to the refund calculation. You may also reach out to customer support via phone; contact details can be found here.

I'm having this issue. State Refund: $145,703

No commas or decimals out of place. The individual number and summations are correct. It's just that final state value.

I'm in Ohio if that has anything to do with it.

I would print it out and check it over and see which lines look wrong.  Before filing,  You can preview the 1040 or print the whole return

https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-filing/00/26160

 I would also delete your W2 and re enter it.  That might clear something out.  Same with any 1099R forms.  I bet it's in a state withholding box like W2 box 17 or 1099R box 12.  Did you import any of your forms?  Import is not always accurate.  

Looks like it was a bug. My mobile app showed $1,475.60, but the browser-based web application showed $147,560.00. Not sure why but when I updated it on the web application it fixed the issue. 

Oh if you change anything on the federal side like on your W2 or 1099R you need to start state over and go though state again.  Did you make any estimated payments?  Check those too.