2 - I'll let you know as soon as I receiveI've received their new brochure.

correct
Correct.

3 - I'll let you know as soon as I've received their new brochure.

.
4 - We'll phone you when the goods will beare here.

.
5When5 - Once we've discussed the contract, we can close the meeting.

.
6 - When we discuss the contract, we must remember to ask about transport costs.

.
7 - We'll deal with insurance after they will tell us about their special discount.

.
8 - Our guests would like to visit the production unit before they will go back to Qatar.

.
9 - Before they sign this contract, they want us to promise them better terms for future business.

.
10 - I don't recommend investing there until they've reduced the government bureaucracy.

.