The county gets paid at closing, not by you
Delinquent property taxes are a lien against the parcel, and liens are settled out of the proceeds at closing before anything is distributed to you. This is routine — the title company calculates the payoff, pays the county, and disburses the balance. You do not need to find the money in advance, and being behind does not make the parcel unsellable.
Where you are in the timeline is the real question
Every state runs its own clock, and the difference between year one and year four of delinquency is enormous. Broadly, counties assess and notice, then either sell a tax lien to an investor or move toward selling the deed itself, with a redemption period in between during which you can still pay and keep the property. Redemption periods vary widely by state — some are measured in months, others in years. Once redemption expires, the property is gone and so is any equity in it. The date on your notice is the single most useful thing you can tell us.
Tax lien states and tax deed states behave differently
In tax lien states the county sells a certificate to an investor who pays your taxes and earns interest, and who can eventually foreclose if you never redeem. In tax deed states the county eventually sells the property itself. In lien states there is usually more time and a clearer payoff figure. In deed states the sale date is a hard deadline. Either way, selling before that date typically returns you far more than letting the process run, because a tax sale is designed to recover the taxes owed, not to return your equity.
A sale can still close inside a short window
Where a sale date is close, the constraint is title work rather than willingness. A clean parcel with one owner can move quickly. Probate that has not closed, heirs who need to be located, or an old unreleased mortgage all take time we may not have. We would rather tell you plainly at the outset that a deadline is not achievable than start a process that fails and leaves you worse off.
Surplus after a tax sale, if it has already happened
If the property has already sold at a tax sale for more than was owed, the difference is often claimable by the former owner. Many states hold these surplus funds for a period, and a large number go unclaimed because owners never learn they exist. Deadlines and procedures vary considerably by state. If your parcel has already been sold, this is worth investigating rather than assuming nothing remains.