Hello! Hope you are doing good

As you've not mentioned your category, its becomes very difficult to talk about the marks required as it differs from category to category. If you belong to the general category then you should aim at getting under 1000 rank in UPSEE to get a seat in IET Lucknow in computer science branch.

Please check the following link to get more information about the UPSEE cutoffs: https://engineering.careers360.com/articles/upsee-cutoff

All the best