Is it accurate to write the following sentences?
Dear English Grammar experts,
I have two questions, hope you can help. Here are my two sentences:
(1) For additional information, please click the following link:
(The link will be here)
Or
For additional information, please click on the following link:
(The link will be here)
Are the previous ones both correct or which is accurate?
(2) In order to better assist you, please write back the following information:
(The required information will be here)
Or
In order to better assist you, please write back with the following information:
(The info will be here)

Are the previous also correct or which one is accurate?

I’ll be grateful to you guys if you can share any information regarding these 2 sentences. Thanks in advance!

Question

Is it accurate to write the following sentences?
Dear English Grammar experts,
I have two questions, hope you can help. Here are my two sentences: 
(1) For additional information, please click the following link:
(The link will be here)
Or 
For additional information, please click on the following link:
(The link will be here)
Are the previous ones both correct or which is accurate? 
(2) In order to better assist you, please write back the following information:
(The required information will be here)
Or 
In order to better assist you, please write back with the following information: 
(The info will be here)

Are the previous also correct or which one is accurate?

I’ll be grateful to you guys if you can share any information regarding these 2 sentences. Thanks in advance!

Answer

"click" / "click on" - either are fine

"write back with" - this only makes sense in a letter or email, but it sounds informal. I would avoid it.

You could instead use "respond with". This is a more formal, but still sounds unusual.

I suggest:
"please supply the following information"
This is a very common phase here.

Answer

1) I think "click on" is a little more formal than just "click", but either is correct.

2) Neither is great. 
The first sentence is wrong, it should be "write back with", as in the second sentence, not just "write back".
However, the phrase "write back" tends to be more associated with physical letters than anything else. It's not incorrect, but a native speaker is far more likely to use the word "reply".
So, "In order to better assist you, please reply with the following information:"

"In order to better assist you, please provide the following information:" (as Bill suggested in his answer) is also a good way of wording it.
Asking them to "provide the" reads as a little more formal than "reply with the", but neither sentence is particularly informal.

Answer

1) either is fine.  2) neither is fine, In order to better assist you please provide the following information.  This would be better than "write back" which is meaningless