Use the ink icon on the printer face panel & pull it downwards. It will show the volume of ink in each of the 4 cartridges loaded in your printer. I’m not sure if the 951 or 952 is compatible with your printer? Or the XL versions of those printer cartridge models? I have an HP OfficeJet 8740 which was top-of-the-line, when it came out almost 3 years ago now, and could not only handle 2 sided printing, but also had 2 paper trays, which also accommodated legal paper! I use the 952 cartridges, but preferably the 952XL. Tomorrow, I am going to try refilling my 952XL double-black cartridge for the 1st time, as it’s “low-on-ink”. I also just noticed there is a 956XL model which outputs 3000 pages, vs. 2000 pages for the 952XL, or 1000 pages for the 952 printer cartridge.
This tech biz wastes so much time that it is best to buy for more pages when we buy!!!