The money stock in January 2020 was $15,419.8 billion. Today it's $19,411.3 billion (fred.stlouisfed.org). That's a 26% increase. In other words, 26% of all dollars in existence came into existence in the last year. Unless you can say the GDP increased by 26% then that means 26% inflation is coming. You can't just increase the supply of money, hold GDP constant, and not have the value of money drop proportionally.

From late 2020: https://www.investmentwatchblog.com/35-of-all-us-dollars-ever-printed-were-printed-this-year/

The primary document that claim was made on: https://fred.stlouisfed.org/series/M1

Edit: Here is a more easily digestible source https://tradingeconomics.com/united-states/money-supply-m0