I tried many (but not all) of the solutions mentioned here to no avail. What worked for me was to open Task Manager, find the listed TT program, highlight it and press "end task" to close it. I had to do that 3 times after restarting my laptop.
Every year I have had this problem. Sometimes I get the 70001 error several times a day. I like to work this years taxes with last year's program open. Saves me time on data input for example. That (sometimes?) gives me the 70001 error.
This problem is so (expletive deleted) frustrating! Like others I waste hours. Some pick up and go with H&R Block or equal. I love TT so I am going to stick it out. However, "This is no way to run an airline"!
Likewise with TT I was a loyal Continental customer. I really did not want to switch to Southwest Airlines!
Greetings;
Big Lou
