i'm wondering if it maters what file type i need to upload
File type is chosen by the in-game screenshot function. Screenshots are stored in C:\Users\***\AppData\Local\WarThunder\Screenshots. To take a screenshot press the Prt Scrn (Print Screen) button.
Sometimes it works better with PNG file, but moustly you should use JPG when you save the files becus the PNG files will often become to big and Misty will reject it. So if she start rejecting try switching type and never save the picture with same name.
The 5 Battle Task I have Completed all I need to do now is wait to get it verified