Look on the side of the seat back, there is either a lever or a pull loop depending on the year of your TJ. That releases the seat back and it also unlocks the seat base so it can be lifted and moved forward for backseat access. There is also a lever on the rear of the seat next to the door opening that can be lifted to do the same thing.
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well if you bought it with seat covers that's pronely the issue. oblong the inner edge of the seat there is a little black strap that start is used turn pull the seat levers and fold it forward. the are are a little sticky and can be a bear sometimes. there is another release on the back lower corner but hard to use with seat in place is meant for back heaters to get out. hope this helps.. as far as service manuals just go to your local autoparts store and pick one up or just ask your repair questions here they get answered usually pretty quick and include the tricks to get it done the manuals don't