Have you tried rebooting your computer?

If a good old fashioned reboot doesnt cure what ails ya, you can try the suggestions here

https://proconnect.intuit.com/community/save-data-file/help/this-file-is-currently-locked-by-another...

I did twice , same problem

Then go with plan B and look at Lisa's link.

Plan C might be here https://proconnect.intuit.com/community/proseries-tax-discussions/discussion/how-do-i-unlock-a-clien...

OR

.https://proconnect.intuit.com/community/proseries-tax-discussions/discussion/this-file-is-currently-...

OR

https://proconnect.intuit.com/community/proseries-tax-discussions/discussion/does-file-is-currently-...

OR

If all else fails https://bfy.tw/QCrB

@George4Tacks  - I see that Intuit has received reports of people having seizures after viewing your avatar.  Have they contacted you about that yet?

Amy commented, but I fear she is no longer with us. I certainly would adjust my behavior if I were informed of any adverse affects on any person. I mean no harm, only just havin' a bit of a lark. 

Well, it does give me something to do when I get bored.  I just open up one of your posts and stare at it intently ----------------------- kinda like staring into a washing machine that has one of those round windows on its door 😀

Do you have Network or Standalone installation?

I have a Standalone installation, this error also happen twice and it happens when I have a file open and the program shut down for some reason, and it take a around half hour before a can open that file again.

I know now how to fix the issue with client being locked, now this happens when I try to print the program shuts down and when I restart the program the client I was working on is locked.

 this issue has happen 6 times, no issues with previous years of pro series only 2020.

In order to assist you further, could you please provide these information?

- Are you able to reproduce it easily?

- Did you try to print to PDF or physical printer, and what the brand/model of the printer?

- Could you please sanitize the return, and send it to ProSeries_Engineering@intuit.com, you can copy & paste the URL of this thread into the email's body for reference?

- If you don't know how to create sanitize return, please let us know which formsets you are having, e.g. 1065, CA, etc.

Thanks, and sorry for the trouble.