No you cannot deactivate a program to get the activation back ... you have the ability to install and activate the program on up to 5 computers that you own (do you own more than 5 ?) .
You also can efile up to 5 tax returns no matter how many computers you use.
These 2 different "5" limits have nothing to do with one another.
only got 4 activations & received error code 603. Thank you
Please see the following link for assistance with the error code.
https://ttlc.intuit.com/community/tax-topics/help/my-code-doesn-t-work/01/871966
If you need further assistance, use the following link to contact customer support.
It's kind of dumb. If you use your 5 activations and your computer crashes, you're screwed. Played by the rules but they're dumb rules. So then what, drop another $60 on Turbotax? Spare me.