Not really sure what problems you have or why you think the U.S. government is supposed to seek you out. If you are behind in filing your tax returns you should seek professional tax help since you mention not doing anything for more than a decade. Your tax issues are beyond anything we can help with here if you have not filed a tax return since the 1990's,
What if I do not file my tax return?
https://ttlc.intuit.com/questions/2572308-what-happens-if-i-don-t-file-my-taxes
Seek local paid tax help for this.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**