How can I stop the IRS from putting a lien on my social security?

You need to pursue with IRS, ASAP, a "collection alternative" to enforced collection.

What is the best way to approach the IRS about paying off a lien and back taxes

You need to retain, ASAP, the services of a competent tax attorney.

I need to negotiate a lower tax settlement with the IRS, please help!

You may qualify for an Offer-in-Compromise which would afford you the opportunity to settle for less than the amount owed, including accruing...

I haven't pay my taxes for the past two years cause of some few financial issues, i want to pay or fix it ?

There are several "collection alternatives" with IRS and you may qualify for one or more of these alternatives.

How do I get more time to allow IRS back taxes for 2004 & 2002 to fall off due to the 10yr last assessed date?

An important factor to be considered is whether your case is in Collection/Final Notice status. This should be reviewed by tax counsel.

Staying "off the radar" with the IRS?

No. However, these are very serious matters and you should not be proceeding without competent tax counsel.

You should be pursuing with IRS a "collection alternative." And then you would not need to worry about enforced collection by IRS.

The IRS, as a general rule, pursues all potential responsible persons. And, it does so unless and until the Trust Fund liabilities are paid in full.

Unpaid Payroll taxes, business closed

These are serious issues and complex cases. Accordingly, you need competent tax counsel. And, if you lose the Trust Fund case, you may still...

You may reapply immediately, especially in view of your changed circumstances.