How do I manage two form tags in one .aspx page?

Use a frameset if u want both the forms visible at a time...

you can have multiple form tag in a asp.net page but one thing keep in ur mind that only one tag should be visible at a time the other will be invisible. so you need to use a asp.net server control like panel and place ur form tag there and make it invisible then it will not throw any kind of error.