In your sentence as amended, send is without a doubt in the present indicative tense (and it is not a conditional sentence). In English, however, the present tense does rather more than express what’s going on in the present. To talk about something that’s going on right now, we generally use be + the –ing form of the verb which describes the action or state. We use the present tense, on the other hand, to refer to:
(1) a fact that is always or generally true (Water boils at 100 degrees centigrade);
(2) a repeated action (I go to church every Sunday);
(3) an event that occurs at the moment we are speaking (I promise); and
(4) fixed or planned events taking place in the future (My flight leaves early tomorrow morning).
In your example, send could express either (2) or (4), depending on the context. In either case, it is understood that the schedules are or will be sent according to a pre-arranged plan. If that were not to be the case, you would have to say We might be able to figure this out from the schedules you’ll be sending us. Perhaps that was what your boss meant. If so, he was half right, but we express the future by using will + the plain form of the verb only when we are making a prediction or when we are expressing a decision, often made at the time of speaking, about the immediate future. Neither of those cases seems likely given the first half of the sentence.
From the wikipedia article on question tags:
The English tag question is made up of an auxiliary verb and a pronoun. The auxiliary has to agree with the tense, aspect and modality of the verb in the preceding sentence. If the verb is in the present perfect, for example, the tag question uses has or have; if the verb is in a present progressive form, the tag is formed with am, are, is; if the verb is in a tense which does not normally use an auxiliary, like the present simple, the auxiliary is taken from the emphatic do form; and if the sentence has a modal auxiliary, this is echoed in the tag.
But then later on:
If the main verb is to have, either solution (does/has) is possible
Using this rule, group 2 and group 4 would both be correct. (As an AmE, I prefer group 2 with group 4 sounding awkward to a degree approaching incorrect, but I'm unsure about BritE)
Following the same rule, group 1 would be correct and group 3 incorrect as has/have is the auxiliary verb, and so it should be used in the question. However, as a native AmE speaker, this actually runs counter to my intuition as I would prefer group 3. I have a feeling this has to do with the 'have got' construction somehow affecting things.
Edit: updated because I should have read the whole thing
Best Answer
The problem with during rain is that during is followed by an indication of a time period. During the winter or during Christmas make perfect sense.
Rain without a definite article generally refers to actual drops of water that are falling. "Rain is falling on my head".
The choice of while over during is because during is followed by a noun, and we don't have a convenient noun available here. The verb to rain allows us to form while it rained. This particular case is not a general rule for all weather-related phenomena. During the storm is perfectly fine; storm is a noun which clearly describes an event.