The Lenovo ThinkPad T490 was released in October 2019, and has 2 different versions. The T490 has an Intel CPU, while there is a T490s with an AMD CPU.
Base Plate
CMOS Battery
RAM
Speaker
These are some common tools used to work on this device. You might not need every tool for every procedure.
Phillips #00 Screwdriver
iFixit Opening Tool
Phillips #1 Screwdriver