Can check my grammar,grammatical mistakes and sentence structure please?

[ma_hegab]

Can check my grammar,grammatical mistakes and sentence structure please?
Further to your mail I would like to inform that this task is for our IT Department in Al Jaber Company. But let me ask the responsible there in IT department Al Jaber Company about this issue if it is free or with charge. If it is with charge we can just do this task by myself but in this case I require the flowing Items mention below.

[emsr2d2]

Can you check the grammar, grammatical mistakes and sentence structure please?

Further to your mail I would like to inform that this task is for our IT Department in Al Jaber Company. But let me ask the responsible there in IT department Al Jaber Company about this issue if it is free or with charge. If it is with charge we can just do this task by myself but in this case I require the flowing Items mention below.

Further to your email, I must inform you that this task is the responsibility of the Al Jaber Company IT department. First, I need to ask the person responsible there if this issue will incur a charge or not. If it will incur a charge, then I will carry out the work myself but I will need the following items:
[list of items].

[Bennevis]

Further to your email, I must inform you that this task is the responsibility of the Al Jaber Company IT department. First, I need to ask the person responsible there if this issue will incur a charge or not. If it will incur a charge, then I will carry out the work myself but I will need the following items:
[list of items].

I was just wondering whether we really are allowed to use "will" in subordinate clauses. Will that be OK to say "If it incurs..." or "If it does incur..."?

[5jj]

I was just wondering whether we really are allowed to use "will" in subordinate clauses. Will that be OK to say "If it incurs..." or "If it does incur..."?

If it will is perfectly OK.It is one of the myths of ELT that will cannot be used in an if-clause.

[Bennevis]

If it will is perfectly OK.It is one of the myths of ELT that will cannot be used in an if-clause.

Do you mean it's perfectly OK in business writing or in general? If that really is a myth, then we can boldly question the validity of most grammar books ever published in non-English-speaking countries.

[Bennevis]

Does it have anything to do with willingness?

Here is what I've found online:

"Finally, willingness (see the word will?) allows will to appear in the if...will clause. Willingness is not the same thing as the future. But it uses the same word. We who speak English are sorry we did this to you. We should have used another word. Here are some examples:
Basic first condition: If he comes by eight o'clock, we will have a party.
First condition with willingness: If he will come by eight o'clock, we will have a party."

[Tdol]

Do you mean it's perfectly OK in business writing or in general? If that really is a myth, then we can boldly question the validity of most grammar books ever published in non-English-speaking countries.

One of the problems with calling things rules is that there are almost always exceptions. It is true that we can use will in a if-clause, but we use it for a reason like negotiating. In most cases it is wrong to use it, so to state it as an absolute rule is not accurate, but I think questioning the validity of grammar books is going over the top. They could phrase it a little better, but I suppose their primary aim is to stop students whose language would use a future form from doing so wrongly, and once that has been mastered the rule could be modified at a higher level to allow for a more nuanced view.