The word ‘forthcoming’ has two main uses. Firstly, to express something that is due to take place in the very near future. Secondly to refer to something that is ready or made available when requested or needed. Someone who is forthcoming with information is a person who is willing to talk or provide information when requested or needed or who volunteers to do so.

1. The author's forthcoming novel is much anticipated, and is expected to be an international best-seller.
2. I asked Brian about his plans for the summer but he was not very forthcoming. I don't know why he feels the need to keep them a secret.

1. The CEO has promised that the matter will be discussed in much more detail at the forthcoming AGM.
2. As our end of month accounts are forthcoming we ask that all receipts be submitted before Wednesday.