Open your chosen flash tool on your PC and navigate to the folder where you extracted the TA-1203 firmware. Connect Device:
To flash the Nokia 105 (2019) TA-1203 Go to product viewer dialog for this item.
Open your flash tool (e.g., SP Flash Tool) and browse to select the downloaded flash file.
Install the Nokia USB Drivers on a PC running Windows 7 or higher.
So, download the flash file if you must. But know that you aren't just updating a phone. You are performing open-source archaeology on a device that refuses to die.