It's the worst possible time to sell anything, so the best advice is probably to hold it until things improve. The key consideration here is whether the rent you are getting is genuine or part of a "guaranteed rent" scam. If the latter, you have already been had and there is nothing you can do about it except to accept the fact. If the rent is real however, then you have an asset that is performing at least, and that is at its lowest value right now, so of course you should hold on to it in those circumstances.
As for taxes, they're part of life!