A general contractor's bid is mostly a stack of sub bids plus its own costs. It collects several sub bids for each trade.
A sub usually sends the same bid to every GC on the bidders list. The bid has a price, a scope letter and any alternates.
State what documents you priced, including each addendum. Break out alternates the way the bid form lists them.
Send it early enough to be leveled against the others. A clear sub bid is easier for the GC to trust and to use.