Let Me Know

Is this the correct grammar?

Not too much. Please tell me if I can be more helpful (or ... if I can be more helpful).

Added: If you asked a question, would you say how can I help you? Or can I be more helpful? But this is a statement, not a question, so the words are reversed.

Is this the right grammar to start with? This is not a proper grammar. Grammar There are too many nouns in this context, and you can't use articles with it. Is this grammar correct? would be nice.

The punishment you have sought is also wrong for two (perhaps three) reasons:

1. You ask the question: Am I ...? For an indirect twist question, don't change the subject and verb, so you have to say please let me know if I can ...

2. We don't call for help anymore. Rather, it is impossible to support others.

3. Please tell me if I can help you and if you believe the person you are talking to really needs help. If it's more likely that you don't need further help, you can say, "Let me know if I can help further."

Please let me know how I can help you.

Or later

Please let me know, is there anything I can do to help you?

Let Me Know

Is this correct grammar? 3
Please tell me how I can help you.
Not too much. Please let me know if I can be more helpful (or ... if I can be more helpful).
Added: If you asked a question, would you say how can I help you? Or can I be more helpful? But this is a statement, not a question, so the words are reversed.
Is this the right grammar to start with? This is not a correct grammar. Grammar is a noun in this context, and you cannot use articles with it. Is this grammar correct? Will be good
The sentence you are asking is also incorrect for two (maybe three) reasons:
1. You ask the question: Am I ...? For the indirect diversion question, don't change the subject and verb so you have to say let me know if I can ...
2. We don't call for help anymore. Rather, relying on others is idiom.
3. Please tell me if I can help you further, which means you are sure that the person you are talking to really needs help. If it is more likely that you do not need further assistance, you can say, "Tell me if I can provide further assistance."
Please tell me how I can help you.
Where
Please tell, can I help you?
:)