Which ink does the Canon PIXMA TS6020 use?

The Canon PIXMA TS6020 (inkjet, 2016) uses PGI-270XL, CLI-271, PGI-270.

Compatible cartridges

CartridgeColorYieldPagesOEM priceCost/page
PGI-270XL black XL500 $21.00 4.2¢ OEM · AmazonCompatible
CLI-271 black standard425 $13.00 3.1¢ OEM · AmazonCompatible
PGI-270 black standard300 $15.00 5.0¢ OEM · AmazonCompatible
CLI-271 cyan standard349 $13.00 3.7¢ OEM · AmazonCompatible
CLI-271 magenta standard320 $13.00 4.1¢ OEM · AmazonCompatible
CLI-271 yellow standard344 $13.00 3.8¢ OEM · AmazonCompatible

XL/high-yield cartridges usually cost more upfront but lower the cost-per-page — better if you print often.