>>Store sales tax as the rate could change if you need to go back a year from now and reprint.
>>
>
>Absolutely. It is a serious issue.
>
>We print all reports to PDF and save the ones that may be needed in the future.


I had an entire project to do that. It was for a securities form and was to satisfy a SEC requirement that financial reports be reproducible X years into the future. (The reason it was an entire project was because we wanted it to run unattended every night).