Commission File Number of issuing entity:  333-226123-10

Central Index Key Number of Issuing entity:  0001824482

Benchmark 2020-B20 Mortgage Trust
(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor:  333-226123

Central Index Key Number of depositor:  0001013611

J.P. Morgan Chase Commercial Mortgage Securities Corp.
(Exact name of depositor as specified in its charter)

John Miller (212) 272-8363
(Name and telephone number, including area code, of the person to contact in connection with this filing)

INFORMATION TO BE INCLUDED IN THIS FORM

Item 1. File an Asset Data File in accordance with Exhibit 601(b)(102) (17 CFR 229.601(b)(102)).

Item 2. File an Asset Related Document in accordance with Exhibit 601(b)(103) (17 CFR 229.601(b)(103)).

SIGNATURES

The depositor has duly caused this Form to be signed on its behalf by the undersigned hereunto duly authorized.

J.P. Morgan Chase Commercial Mortgage Securities Corp.
(Depositor)