These memory errors happen when there are problems with file accessing and rights. In most cases, this can be solved by running the application with a user which has administration rights. You could also uninstall and then install software again because this could be a reason of the corrupted registry. Alternatively, please check the official website of your tax program for an update/patch because this could also be a bug of the application. But if the program worked well, then most definitely there is a problem with the software itself.