Can I take a general multivitamin instead of this Heme Iron Polypeptide 12mg Tablet?

It depends on why this was recommended to you in the first place. Heme iron polypeptide is specifically meant to treat or prevent iron deficiency, and most standard multivitamins contain only a small amount of iron not enough to correct a real deficiency or replace iron therapy. If a blood test showed low iron or hemoglobin, I'd hold off on substituting it yourself and instead ask your doctor whether a multivitamin would actually cover your needs.