Can I load *.tt23 file into online version? Last year I used installed version and it has all relevant info.

How to transfer last year’s return?

https://ttlc.intuit.com/questions/1900883-how-do-i-transfer-last-year-s-return-to-turbotax-online

 

https://ttlc.intuit.com/questions/2262857-when-transferring-a-tax-file-what-information-carries-over-to-my-return

 

https://ttlc.intuit.com/questions/1900883

 

out of the 3 links, non worked

If you used Turbo Tax last you should be transferring from the Turbo Tax return.  If you used the installed program for 2023 you transfer from the file ending in .tax2023.  

Is .tt23 a HR Block file?  Not sure if you can transfer it into the Online version.

Transfer into the Online version

https://ttlc.intuit.com/community/entering-importing/help/how-do-i-transfer-last-year-s-return-into-turbotax-online/00/25953